Again you'll need at least a 125 gal. if you want any lifelong tankmates but for now if you have at least a 55 you can get any with 2 other fish that can hold their own ie. managuense,labiatum, many veja,tomocichla species on average. don't introduce a single fish as in a one on one one fish wil die if you add at least 2 other fish & change around decorations the butti. will not be able to single out 1 fish.